Hill's has a diet for dogs with cancer called n/d that you could discuss with your veterinarian. We recommend that dogs with cancer receive either a good quality commercial diet or a balanced home-cooked diet, and you can consult with your vet or a veterinary nutritionist about cooking for your dog. I do not recommend that dogs on chemotherapy eat raw meat as they are at risk for developing infections from raw meat and could even pass these infections on to their owners.